Nuclear power, of course, but Fusion has been achieved, very briefly, when that tech becomes more viable, in about 20 years or more then that will become our main source of power.
Wind power and wave power just can't cut it just yet, but I believe that every new house should be built with a wind turbine attached and solar panels, a heat pump should be mandatory as well supplied by the wind turbine and the solar panels.

__________________The most elementary and valuable statement in science, the beginning of wisdom, is ‘I do not know’.